$OpenBSD: patch-wavpack_pc_in,v 1.1 2014/05/19 16:57:39 sthen Exp $

Fix output of "pkg-config --libs wavpack".

http://sourceforge.net/p/wavpack/mailman/message/31954297/
https://github.com/dbry/WavPack/commit/779a2e62783acc6a46f75dd89359e95079ef708a

--- wavpack.pc.in.orig	Sun Sep 29 23:30:14 2013
+++ wavpack.pc.in	Mon May 19 02:16:06 2014
@@ -1,6 +1,7 @@
 prefix=@prefix@
+exec_prefix=@exec_prefix@
 libdir=@libdir@
-includedir=${prefix}/include
+includedir=@includedir@
 
 Name: wavpack
 Description: wavpack library
